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Air in 310C backhoe boom cylinder

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Eldon

11-11-2000 12:23:21




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I baught a used 310C backhoe and it has air in the boom cylinder only. Ive tried everything but the air comes back. My local dealor mechanics have no ideas! HELP!




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Joe M

11-12-2000 06:44:36




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 Re: air in 310C backhoe boom cylinder in reply to Eldon, 11-11-2000 12:23:21  
Most hoes run between 2,000 and 2,500 psi hydraulic pressure, this should plurge the air out if the cylinder is stroked completely each way a time or two. Why do you believe you have air in the cylinder?



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Eldon

11-12-2000 13:41:10




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 Re: Re: air in 310C backhoe boom cylinder in reply to Joe M, 11-12-2000 06:44:36  
Thanks Joe M. I know all about purging of a cylinder! But the boom on a 310c will not allow the cylinder to travel all the way out. So it cannot purge like you would think. Ive gone through all of that. When I take the cylinder loose at one end to allow it to travel all the way out to purge the air out, it will be fine until it sits over night , then the air returnes and when I try to put donward pressure, there is a 3 to 4 second hesatatin before it will push down. Plus all the other cylinders work fine.

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